Trees and Your Power Supply
Public Safety is at the heart of everything Westpower does. Trees that grow too close to power lines or are in contact with powerlines can cause serious problems. They can cause electric shock, fire, power outages and damage electricity infrastructure.
Trees near power lines
Trees in contact with power lines pose a serious risk, potentially causing electrocution or injury if someone touches a tree that’s been made "live" by a power line.
Keeping vegetation safely clear of power lines helps protect people, electricity infrastructure and helps keep the lights on for you and your community.
The Electricity (Hazards from Trees) Regulations set out the rules that tree owners and lines companies must follow when managing trees near power lines. These regulations are part of New Zealand law.
The following pages explain the main rules, including what tree owners need to know. If you're unsure about a tree near a power line, please contact Westpower before doing any work.
- Know the Regulations: Follow the Electricity (Hazards from Trees) Regulations 2003 to protect yourself and your family.
- Choose Wisely & Keep Trees Clear: Be cautious when planting near power lines—trees like Pine, Blue Gum and Willow can grow into hazards. Avoid planting under or near power lines to prevent future interference.
Dangers of Cutting Trees Near Power Lines
Cutting or trimming trees near power lines is extremely dangerous and can cause electrocution.
- Disconnect Power: Contact Westpower to safely disconnect your power before starting tree work (free of charge).
- Hire Qualified Contractors: Ensure your contractor follows safety regulations and has the proper insurance and approval from Westpower.
For more info, see our 'Trees and Your Power Supply' guide.
If there is immediate danger
Call 111 immediately if there is an emergency.
Never touch a power line and never touch a tree or branch that is touching a power line. If you come across downed lines, never approach or attempt to clear them yourself. Stay at least 10 metres away and call 111.
You should also contact Westpower immediately if:
- a tree or branch has fallen onto a power line
- a tree looks like it could fall onto a power line soon
- a power line is down, damaged, or hanging low
- branches are touching lines
- someone is at risk of coming into contact with the line
Call Westpower on 0800 768 241.